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WO2000035361A1 - Vis a os - Google Patents

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Publication number
WO2000035361A1
WO2000035361A1 PCT/DE1999/003604 DE9903604W WO0035361A1 WO 2000035361 A1 WO2000035361 A1 WO 2000035361A1 DE 9903604 W DE9903604 W DE 9903604W WO 0035361 A1 WO0035361 A1 WO 0035361A1
Authority
WO
WIPO (PCT)
Prior art keywords
bone screw
shaft
bone
screw according
screw
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/DE1999/003604
Other languages
German (de)
English (en)
Inventor
Onur Tarhan
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of WO2000035361A1 publication Critical patent/WO2000035361A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws or setting implements
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/84—Fasteners therefor or fasteners being internal fixation devices
    • A61B17/86—Pins or screws or threaded wires; nuts therefor
    • A61B17/8685—Pins or screws or threaded wires; nuts therefor comprising multiple separate parts
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws or setting implements
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/72—Intramedullary devices, e.g. pins or nails
    • A61B17/7233—Intramedullary devices, e.g. pins or nails with special means of locking the nail to the bone
    • A61B17/7258—Intramedullary devices, e.g. pins or nails with special means of locking the nail to the bone with laterally expanding parts, e.g. for gripping the bone
    • A61B17/7266—Intramedullary devices, e.g. pins or nails with special means of locking the nail to the bone with laterally expanding parts, e.g. for gripping the bone with fingers moving radially outwardly

Definitions

  • the invention relates to a bone screw according to the preamble of patent claim 1.
  • Bone screws or fixation elements are preferably used in the reconstructive surgery of the spine or the femoral neck.
  • a bone-fixing screw pin is already known, which is used to break broken
  • This screw pin has a front threaded part, which is screwed into a bone, and a rear part without thread, which is bent like a loop and thereby forms an opening into which parts of a locking element can be inserted.
  • a plate which conforms to and is connected to the femur (US Pat. No. 5,810,821).
  • This plate has at its upper end an oblique sleeve into which a screw can be inserted.
  • a screw is also inserted into the sleeve, which is screwed into the head of the femoral neck.
  • a bone screw with several axes which has a partially spherical head, which is cut off at the top and has a recess
  • a bone screw which has a head region and a shaft region, the shaft region being provided with a special recess at its end (US Pat. No. 5,797,914). Thanks to the special recess, the screw can be easily screwed into bone.
  • Another known bone screw has a thread on the outside of its lower shaft part, this shaft having a blind hole on the inside (US Pat. No. 5,743,914). The thread consists of threads of different diameters. In this blind hole, which is hexagonal, a tool can be inserted which drives the screw into bone material.
  • a fixator for restoring fractures and arthroplastics of the skeleton which has a holder which is set at an angle with respect to the head of the corresponding screw and has a recess with a sector-shaped cross section (DE 195 34 136 AI).
  • a first screw is screwed into a head bore, a second screw lying perpendicular to the axis of this screw.
  • the task of the known fixator is to obtain a sufficiently rigid device when joining bone fragments, which ensures a perfect rotation and translation blocking of connecting rods.
  • a lock is provided in order to prevent or make it difficult to pull this screw out (US-A-5 478 342).
  • the bone screw can be hollow, a wire spring being inserted into the cavity of the bone screw before the bone screw is used.
  • This wire spring which has ends that are angled outwards, acts as an anchoring element in the bone, because the screw and wire spring form a kind of expansion dowel.
  • End is provided with an attached thread.
  • a rod-shaped tool can be pushed through this sleeve, with which the screwed-on thread can be actuated in the direction of the screw head.
  • the bone screw is not anchored by enlarging the thread arranged vertically to the longitudinal axis of the screw, but by tightening this thread firmly in the direction of the screw
  • the object of the invention is to anchor a bone screw in a metered manner in a bone without substantially changing the forces parallel to the longitudinal axis of the screw.
  • the invention thus relates to a bone screw which is used to join broken bones.
  • a bone screw which is used to join broken bones.
  • two vertebrae of a spine or a femur can be connected to a broken neck bone.
  • the bone screw is screwed into the bone using an external thread. Then it is locked with the help of bolts that emerge laterally from the shaft of the bone screw as soon as an element located in this shaft is turned from the outside.
  • the advantage achieved by the invention is, in particular, that a bone screw, once screwed into a bone, is locked by simply actuating a threaded rod located in the bone screw, in that the bone screw extends anchoring pins. This prevents loosening of the bone screw.
  • FIG. 1 shows a side view of a bone screw
  • Fig. 2 is a view of the bone screw of FIG. 1, but 90 degrees around
  • FIG. 3 shows a top view of the bone screw shown in FIG. 1;
  • Fig. 4 is a longitudinal section A-A through the bone screw shown in Fig. 3;
  • Fig. 5 is an enlarged view of an area in which a threaded rod in a
  • Gear roller engages 6 shows a bone screw in which the bolts act as a lock nut; 7 shows a front view of lumbar vertebrae with sacrum, a bone screw being driven into two lumbar vertebrae; FIG. 8 shows a side view of the illustration according to FIG. 7;
  • Fig. 9 shows an application of the bone screw for connecting parts of a Femoral bone
  • 10 shows a section BB according to FIG. 9.
  • FIG. 1 shows a bone screw 1 according to the invention, which has a shaft 2 with a self-tapping external thread 3 and a hexagon head 4.
  • the lower end of the shaft is closed with a cone 5, the tip of which points downwards.
  • Two bolts 6, 7 protrude from the shaft 2, the longitudinal axes of which are at a distance a from one another, these longitudinal axes being offset by 90 degrees.
  • the conical tip of the pin 6 is designated by the reference number 8, while the corresponding tip of the pin 7 is designated by 9.
  • FIG. 2 shows the same bone screw 1 as shown in FIG. 1, but by 90
  • FIG. 3 shows a view from above of the bone screw 1, specifically in the position of FIG. 1.
  • the hexagonal head 4 and the tips 8, 9 of the bolts 6, 7 can be seen here.
  • a bore 10 can be seen in the center of the hexagon head 4, in which there is a threaded rod 13, the head 11 of which is provided with a hexagon hole 12.
  • the tips 8, 9 of the bolts 6, 7 are arranged offset by an amount b about the central axes of the hexagon head 4.
  • FIG. 4 shows a longitudinal section A-A according to FIG. 3 through the bone screw 1.
  • the threaded rod 13 is provided with an external thread 14 which is in engagement with a first gear roller 15 and a second gear roller 16. Both gear rollers 15, 16 are connected in one piece to the bolts 6, 7, these bolts
  • the bolt 6 wears a thread on the outside.
  • the bolt 6 is shown in the retracted state in FIG. 4 and is designated 6 ". Its extended state is shown in dashed lines and labeled 6 '. Of the threads of the bolts 6, 7, only the thread 17 of the bolt 6 can be seen.
  • Bolts 6, 7 and gear rollers 15, 16 are guided through transverse bores 18, 19 of the shaft 2, an area of a transverse bore 18, 19 being provided with an internal thread 20.
  • the distance x 2 of the internal thread 20 from the bore 10 for the threaded rod 13 is as large as the maximum distance of the tip 8 'of the bolt 6' from the outer jacket of the shaft 2.
  • FIG. 5 shows an enlarged section X of FIG. 4.
  • part of the external thread of the threaded rod 13 and the teeth of the gear roller 15 are shown in more detail in the area in which they mesh. You can see the
  • the gaps between the teeth 24, 25, 26 of the gear roller 15 are designated 22, 23.
  • the operation of the bone screw 1 shown in FIGS. 1 to 5 is as follows.
  • gear rollers 15, 16 are integrally connected to the bolts 6, 7 and these bolts have an external thread which engages in an internal thread 20 of the bone screw 1, these bolts 6, 7 are displaced along their longitudinal axes when they are rotated. For the bolt 6, the displacement movement is indicated by the arrow 35. Since this also shifts the gear rollers 15, 16 along their longitudinal axes, it is necessary to match the external threads of the bolts 6, 7 with the internal thread of the shaft so that they have the same coordination as the teeth of the gear rollers 15, 16 with the external thread of the threaded rod 13.
  • FIG. 6 shows a variant of the bone screw shown in FIGS. 1 to 5, as can be used in the case of a broken bone, namely in a screwed-in condition.
  • the bone screw 1 shown in FIG. 6 has a round head 50 which rests on a recess in a plate 51. Broken bone parts are held together by this plate. The fracture point of the bone could lie approximately on the right edge of the illustration in FIG. 6.
  • the plate 51 must then be thought to be continued to the right, a further bone screw being provided in the right continuation, which engages in the bone in the same way as the bone screw shown. Since the representation of the second screw is a mirror-image representation of the first, this representation is dispensed with.
  • the shaft 2 which is screwed through its external thread 3 through a bone cortex 57 and projects into the bone marrow 52.
  • a bore in which the threaded rod 13 is located runs again centrally to the round head 50 and to the shaft 2. Due to its own rotational movement, the threaded rod 13 moves two bolts 53, 54, the longitudinal axis of which, however, does not run perpendicular to the longitudinal axis of the threaded rod 13, but rather at a predetermined angle ⁇ or ⁇ . With their tips 55, 56 these bolts abut against the underside of the bone cortex 57 on which the plate 51 rests.
  • the bolts 53, 54 moved out thus perform the function of a lock nut for the bone screw 1.
  • FIG. 7 shows several lumbar vertebrae 60 to 64 of a spine as well as a sacrum 65 and a coccyx 66 in a view from the front.
  • a support rod 67 can be seen to the side of the lumbar vertebrae 61 to 63, on which a web 68 rests, which supports the head 4 of the bone screw 1.
  • the shaft 2 of the bone screw 1 has a total of four bolts 70 to 73 instead of two.
  • a second bone screw 75 is connected to the vertebra 61.
  • This bone screw 75 has a head 76 and a shaft 77, the shaft being provided with four bolts 78 to 81.
  • the spinous processes 82, 83, 84, 85, 86 of the spine on the right side are partially covered because of the web 68 and the screw heads 4, 76.
  • the spinous processes 91 to 94 on the left side are exposed.
  • FIG. 8 shows the lumbar vertebrae 60 to 64 in a side view.
  • the two bone screws 1 and 75 rest on the webs 68 and 89, the webs 68, 89 being displaceable along the support rods 67, 88. Due to the firm anchoring of the bone screw in the lumbar vertebrae 61, 63, it is practically impossible that the lumbar vertebrae 61, 63 can change their relative position to one another. Without this firm anchoring, it would be possible to move the
  • Parts 68, 67, 88, 89 existing device in the manner of a parallelogram are not excluded.
  • Fig. 9 shows an application of a bone screw 103 for the connection of a broken femoral neck bone. Between a femoral neck 100 and one
  • a fracture 102 in the femur 101 which is bridged by means of the bone screw 103.
  • the bone screw 103 there are four obliquely arranged bolts 104 to 107.
  • 108 denotes an intramedullary nail which has been driven into the femur 101 and fastened in it with a cement.
  • a screw 109 with a head 110 and a leg is located in the lower region of the bone 101. It locks the lower end of the intramedullary nail 108.
  • the bone screw 103 thus connects the femoral neck 100 to the femur 101 and the intramedullary nail 108.
  • FIG. 10 shows a view of the bone screw 103 in the viewing direction B-B.
  • the four bolts 104 to 107, a hexagonal head 111 and a hexagonal bore 112 can be seen here.
  • the broken lines I and II indicate the limits of the cut according to FIG. 9.

Landscapes

  • Health & Medical Sciences (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Surgery (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Neurology (AREA)
  • Medical Informatics (AREA)
  • Molecular Biology (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Surgical Instruments (AREA)

Abstract

L'invention concerne une vis à os utilisée pour assembler des parties d'os cassés. On peut, par exemple, avec une telle vis, relier deux vertèbres de la colonne vertébrale ou bien le fémur à son col cassé. La vis à os présentée est, à cet effet, vissée dans les os au moyen de son filetage extérieur. Elle est ensuite bloquée à l'aide d'axes filetés qui sortent latéralement de la tige de la vis à os dès que l'on fait tourner, depuis l'extérieur, un élément se trouvant dans ladite tige.
PCT/DE1999/003604 1998-12-11 1999-11-12 Vis a os Ceased WO2000035361A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19857279.4 1998-12-11
DE1998157279 DE19857279A1 (de) 1998-12-11 1998-12-11 Knochenschraube

Publications (1)

Publication Number Publication Date
WO2000035361A1 true WO2000035361A1 (fr) 2000-06-22

Family

ID=7890797

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1999/003604 Ceased WO2000035361A1 (fr) 1998-12-11 1999-11-12 Vis a os

Country Status (2)

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DE (1) DE19857279A1 (fr)
WO (1) WO2000035361A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017143330A1 (fr) * 2016-02-18 2017-08-24 K2M, Inc. Ensembles fixations chirurgicales et leurs procédés d'utilisation

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7780710B2 (en) 2004-01-23 2010-08-24 Depuy Products, Inc. System for stabilization of fractures of convex articular bone surfaces including subchondral support structure
US7938850B2 (en) 2002-05-30 2011-05-10 Depuy Products, Inc. Nail plate
US8182485B1 (en) 2003-11-21 2012-05-22 Toby Orthopaedics, Llc Fracture fixation system
JP4790634B2 (ja) 2004-01-23 2011-10-12 デピュイ・プロダクツ・インコーポレイテッド 軟骨下支持構造を有する、凸状関節骨面の骨折を固定するためのシステム
US7001388B2 (en) * 2004-01-23 2006-02-21 Hand Innovations, Llc System for stabilization of fractures of convex articular bone surfaces including subchondral support structure
CA2596266C (fr) 2005-01-28 2015-03-31 Depuy Products, Inc. Systeme clou-plaque
US20090125071A1 (en) * 2007-10-23 2009-05-14 Skinlo David M Shape-changing anatomical anchor
AU2009223517B2 (en) 2008-03-10 2015-02-12 Eduardo Gonzalez-Hernandez Bone fixation system
WO2009128846A1 (fr) 2008-04-17 2009-10-22 Mgh Meddesign, Llc Système et pince de fixation de tissu mou
DE102010046979A1 (de) * 2010-09-30 2012-04-05 Universität Rostock Knochenschraube zur Verwendung bei der Osteosynthese
US8961573B2 (en) 2010-10-05 2015-02-24 Toby Orthopaedics, Inc. System and method for facilitating repair and reattachment of comminuted bone portions
WO2012058448A2 (fr) 2010-10-27 2012-05-03 Toby Orthopaedics, Llc Système et procédé de remplacement de fracture pour fractures osseuses comminutives ou leurs parties adjacentes à des articulations osseuses
WO2012119146A2 (fr) 2011-03-03 2012-09-07 Toby Orthopaedics, Llc Dispositif de fixation selon un angle fixe par rapport à une tubérosité antérieure moins importante et procédé d'utilisation associé à ce dernier
US9730797B2 (en) 2011-10-27 2017-08-15 Toby Orthopaedics, Inc. Bone joint replacement and repair assembly and method of repairing and replacing a bone joint
US9271772B2 (en) 2011-10-27 2016-03-01 Toby Orthopaedics, Inc. System and method for fracture replacement of comminuted bone fractures or portions thereof adjacent bone joints
US9402667B2 (en) 2011-11-09 2016-08-02 Eduardo Gonzalez-Hernandez Apparatus and method for use of the apparatus for fracture fixation of the distal humerus
DE102012101978A1 (de) * 2012-03-08 2013-09-12 Normed Medizin-Technik Gmbh Fußchirurgische intramedulläre Verriegelungs-Knochenschraube zur Fixation des Großzehengrundgelenks
US9283008B2 (en) 2012-12-17 2016-03-15 Toby Orthopaedics, Inc. Bone plate for plate osteosynthesis and method for use thereof
US9333014B2 (en) 2013-03-15 2016-05-10 Eduardo Gonzalez-Hernandez Bone fixation and reduction apparatus and method for fixation and reduction of a distal bone fracture and malunion
DE102021004940A1 (de) 2021-10-01 2023-04-06 Westsächsische Hochschule Zwickau, Körperschaft des öffentlichen Rechts Vorrichtung zur Behandlung von Frakturen

Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3791380A (en) * 1971-12-13 1974-02-12 G Dawidowski Method and apparatus of immobilizing a fractured femur
US4013071A (en) * 1974-11-11 1977-03-22 Lior Rosenberg Fasteners particularly useful as orthopedic screws
US4237875A (en) * 1979-02-23 1980-12-09 Towmotor Corporation Dynamic intramedullary compression nailing
US4636121A (en) * 1985-04-22 1987-01-13 Miller Lillias S Holding screw
US5122133A (en) 1990-10-26 1992-06-16 Smith & Nephew Richards Inc. Compression screw for a joint endoprosthesis
US5478342A (en) 1994-06-30 1995-12-26 Spinetech, Inc. Reversible bone screw lock
DE19534136A1 (de) 1994-09-15 1996-03-21 Tornier Sa Externer oder interner Fixateur zur Wiederherstellung von Brüchen oder Arthroplastiken des Skeletts
US5578035A (en) * 1995-05-16 1996-11-26 Lin; Chih-I Expandable bone marrow cavity fixation device
US5743914A (en) 1996-06-06 1998-04-28 Skiba; Jeffry B. Bone screw
US5797911A (en) 1996-09-24 1998-08-25 Sdgi Holdings, Inc. Multi-axial bone screw assembly
US5797914A (en) 1995-12-21 1998-08-25 Kls Martin, L.P. Bone screw
US5810820A (en) * 1994-05-20 1998-09-22 Santori; Francesco Saverio Endomedullar device for nailing long distance
US5810821A (en) 1997-03-28 1998-09-22 Biomet Inc. Bone fixation screw system
US5810814A (en) 1994-09-27 1998-09-22 Newson; Charles James Bone fixing screw pin

Patent Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3791380A (en) * 1971-12-13 1974-02-12 G Dawidowski Method and apparatus of immobilizing a fractured femur
US4013071A (en) * 1974-11-11 1977-03-22 Lior Rosenberg Fasteners particularly useful as orthopedic screws
US4237875A (en) * 1979-02-23 1980-12-09 Towmotor Corporation Dynamic intramedullary compression nailing
US4636121A (en) * 1985-04-22 1987-01-13 Miller Lillias S Holding screw
US5122133A (en) 1990-10-26 1992-06-16 Smith & Nephew Richards Inc. Compression screw for a joint endoprosthesis
US5810820A (en) * 1994-05-20 1998-09-22 Santori; Francesco Saverio Endomedullar device for nailing long distance
US5478342A (en) 1994-06-30 1995-12-26 Spinetech, Inc. Reversible bone screw lock
DE19534136A1 (de) 1994-09-15 1996-03-21 Tornier Sa Externer oder interner Fixateur zur Wiederherstellung von Brüchen oder Arthroplastiken des Skeletts
US5810814A (en) 1994-09-27 1998-09-22 Newson; Charles James Bone fixing screw pin
US5578035A (en) * 1995-05-16 1996-11-26 Lin; Chih-I Expandable bone marrow cavity fixation device
US5797914A (en) 1995-12-21 1998-08-25 Kls Martin, L.P. Bone screw
US5743914A (en) 1996-06-06 1998-04-28 Skiba; Jeffry B. Bone screw
US5797911A (en) 1996-09-24 1998-08-25 Sdgi Holdings, Inc. Multi-axial bone screw assembly
US5810821A (en) 1997-03-28 1998-09-22 Biomet Inc. Bone fixation screw system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017143330A1 (fr) * 2016-02-18 2017-08-24 K2M, Inc. Ensembles fixations chirurgicales et leurs procédés d'utilisation
US10905484B2 (en) 2016-02-18 2021-02-02 K2M, Inc. Surgical fixation assemblies and methods of use

Also Published As

Publication number Publication date
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